---
title: RtkJoinButton
description: API reference for RtkJoinButton component (Flutter Library)
image: https://developers.cloudflare.com/dev-products-preview.png
---

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# RtkJoinButton

A button widget for joining a RealtimeKit meeting room. Provides visual feedback during the joining process.

## Properties

| Property        | Type              | Required | Default              | Description                                 |
| --------------- | ----------------- | -------- | -------------------- | ------------------------------------------- |
| meeting         | RealtimekitClient | ✅        | \-                   | Meeting client instance                     |
| onMeetingJoined | VoidCallback?     | ❌        | \-                   | Callback invoked when the meeting is joined |
| rtkDesignToken  | RtkDesignTokens?  | ❌        | Global design tokens | Design tokens for customization             |
| height          | double?           | ❌        | \-                   | Height of the button                        |
| width           | double?           | ❌        | \-                   | Width of the button                         |
| isDisabled      | bool              | ❌        | false                | Whether the button is disabled              |

## Usage Examples

### Basic Usage

Dart

```
import 'package:realtimekit_ui/realtimekit_ui.dart';
RtkJoinButton(  meeting: yourMeetingInstance,)
```

### With Properties

Dart

```
import 'package:realtimekit_ui/realtimekit_ui.dart';
RtkJoinButton(  meeting: yourMeetingInstance,  onMeetingJoined: () {    // Handle successful join  },  height: 50.0,  width: 200.0,  isDisabled: false,)
```

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```